Japatan
Formation
- N + はもとより、N + も
Explanation
It means "~ is obvious, and something else is also true." The first noun is the obvious case, and the second part adds something wider or less expected, often with も or まで. It means the same as 〜はもちろん but is more formal and written.
Examples
この祭りには、地元の人はもとより、海外からの観光客も大勢訪れる。
This festival attracts many tourists from abroad, not to mention local people.
彼女は英語はもとより、フランス語も話せる。
She speaks French, to say nothing of English.
このアプリは、学生はもとより、社会人にも人気がある。
This app is popular with working people, not just students.
新製品の開発には、技術はもとより、市場の調査も欠かせない。
Developing a new product requires market research as well as technology, of course.
Notes
It basically follows a noun. The adverb もとより can also mean "from the start", so learn the set form 〜はもとより、〜も.
Related grammar
Mini quiz
1この料理は、子ども（ ）、大人も喜んで食べる。
Answer and explanation
Answer: 2 はもとより
"Adults, not to mention children, enjoy this dish." はもとより fits because children are the obvious case and adults are added with も. はともかく would set children aside.
2「はもとより」の使い方が正しい文はどれですか。
Answer and explanation
Answer: 3 社長はもとより、新入社員まで会議に出た。
3 is correct: "Even new employees attended the meeting, not to mention the president." 1 adds nothing with も. 2 and 4 attach はもとより directly to an adjective or verb, which is wrong.
3彼は国内はもとより、海外（ ）名前が知られている。
Answer and explanation
Answer: 1 でも
"He is well known abroad, not to mention in his own country." After はもとより, something is added with も, so でも is correct. より is for comparison and does not fit, and しか and だけ narrow the range.
